Lock And Unlock A Folder (C#.net)

The following code shows you how to lock and unlock a folder. User can browse the specific folder to lock/Unlock it.

using System.IO;

using System.Security.AccessControl;

private void btnBrowse_Click(object sender, EventArgs e)

{

   if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)

   {

        textBox1.Text = folderBrowserDialog1.SelectedPath;

   }

}

private void btnLock_Click(object sender, EventArgs e)

{

  try

     {

      string folderPath = textBox1.Text;

      string adminUserName = Environment.UserName;// getting your adminUserName

      DirectorySecurity ds = Directory.GetAccessControl(folderPath);
    FileSystemAccessRule fsa = new FileSystemAccessRule(adminUserName,  FileSystemRights.FullControl, AccessControlType.Deny)

      ds.AddAccessRule(fsa);

      Directory.SetAccessControl(folderPath, ds);

      MessageBox.Show("Locked");

     }

     catch (Exception ex)

     {

        MessageBox.Show(ex.Message);

     }       

}

private void btnUnLock_Click(object sender, EventArgs e)

{

   try

      {

     string folderPath = textBox1.Text;

     string adminUserName = Environment.UserName;// getting your adminUserName

     DirectorySecurity ds = Directory.GetAccessControl(folderPath);
  FileSystemAccessRule fsa = new FileSystemAccessRule(adminUserName,  FileSystemRights.FullControl, AccessControlType.Deny)

     ds.RemoveAccessRule(fsa);

     Directory.SetAccessControl(folderPath, ds);

     MessageBox.Show("UnLocked");

     }

     catch (Exception ex)

     {

        MessageBox.Show(ex.Message);

     } 

}